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Microwave small signal wideband low noise amplifier design

Author: YinLian
Tutor: YangZuo
School: University of Electronic Science and Technology
Course: Circuits and Systems
Keywords: Low-noise Amplifier ADS simulation Negative feedback
CLC: TN722.3
Type: Master's thesis
Year: 2011
Downloads: 213
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Abstract


Microwave wideband low noise amplifier has an important role in microwave communication systems , electronic warfare systems , radar systems , microwave components , is one of the core components . Signal characteristics , its performance has a direct impact to the entire receiver system sensitivity and other important parameters . In modern society, highly developed science and technology and manufacturing process context , the development of the microwave broadband low-noise amplifier put forward higher requirements. The main work of this paper are: made ??a detailed description and analysis of the significance and background of the of microwave communication growth and development of broadband low-noise amplifier , the microwave amplification circuit structure , and pointed out that different circuit excellent , and disadvantage analysis some of the main parameters of the receiver and the low - noise amplifier , and from the actual measurement results on analysis of the reasons that cause changes in these parameters . This design uses negative feedback amplifier circuit small signal model , the choice of the NEC's GaAs chip NE3210 . Using front a feedback applied to reduce noise , the two series circuit after an additional parallel negative feedback in order to improve system stability and extended bandwidth . By novel design methods designed to improve the bandwidth of the input , output, and the inter-stage matching circuit . Made a DC simulation using Agilent ADS simulation software system S parameter simulation and co-simulation design method principle simulation results ; AutoCAD software for circuit board layout , testing is the use of the HP series vector network analyzer and noise analyzer completed. 2-6GHz broadband low-noise amplifier is achieved by the use of negative feedback . After several modifications and the measured gain of the amplifier is 20 ± 1dB, the input and output VSWR of less than 2.5 , the noise figure is less than 3dB, achieve the design target . Finally, the analysis of the test results .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Amplification technology,the amplifier > Amplifier > Low-noise amplifier
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